<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算器</title>
</head>
<body>
<div>
  <input type="text" v-model="num1">
  <input type="text" v-model="num2">
  <input type="button" value="加" @click="f(1)">
  <input type="button" value="减" @click="f(2)">
  <input type="button" value="乘" @click="f(3)">
  <input type="button" value="除" @click="f(4)">
  <h1>结果:{{info}}</h1>
</div>
<script src="../js/vue.js"></script>
<script>
  let v = new Vue({
    el:"div",
    data:{info:"",num1:"",num2:""},
    methods:{
      f(key) {
        switch (key){
          case 1:
            v.info = v.num1 * 1 + v.num2 * 1
            break
          case 2:
            v.info = v.num1 - v.num2
            break
          case 3:
            v.info = v.num1 *  v.num2
            break
          case 4:
            v.info = v.num1 / v.num2
            break
        }
      }
    }
  })
</script>
</body>
</html>